 /*******************************************************************************
  * Copyright (c) 2000, 2006 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  * IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.ui.actions;

 import org.eclipse.jface.action.IAction;
 import org.eclipse.jface.viewers.ISelection;
 import org.eclipse.swt.widgets.Event;
 import org.eclipse.ui.IActionDelegate2;

 /**
  * Abstract base implementation of <code>IActionDelegate</code> and
  * <code>IActionDelegate2</code> for a client delegate action.
  * <p>
  * Subclasses should reimplement <code>runWithEvent</code> or <code>run</code>
  * methods to do the action's work, and may reimplement
  * <code>selectionChanged</code> to react to selection changes in the workbench.
  * </p>
  */
 public abstract class ActionDelegate implements IActionDelegate2 {
     /**
      * The <code>ActionDelegate</code> implementation of this
      * <code>IActionDelegate</code> method does nothing. Subclasses may
      * reimplement.
      * <p>
      * <b>Note:</b> This method is not called directly by the proxy action. Only
      * by the default implementation of <code>runWithEvent</code> of this
      * abstract class.
      */
     public void run(IAction action) {
     }

     /**
      * The <code>ActionDelegate</code> implementation of this
      * <code>IActionDelegate</code> method does nothing. Subclasses may
      * reimplement.
      */
     public void selectionChanged(IAction action, ISelection selection) {
     }

     /**
      * The <code>ActionDelegate</code> implementation of this
      * <code>IActionDelegate2</code> method does nothing. Subclasses may
      * reimplement.
      */
     public void init(IAction action) {
     }

     /**
      * The <code>ActionDelegate</code> implementation of this
      * <code>IActionDelegate2</code> method does nothing. Subclasses may
      * reimplement.
      */
     public void dispose() {
     }

     /**
      * The <code>ActionDelegate</code> implementation of this
      * <code>IActionDelegate2</code> method redirects to the <code>run</code>
      * method. Subclasses may reimplement.
      */
     public void runWithEvent(IAction action, Event event) {
         run(action);
     }
 }

